Announcing the new guidelines, Mr. Trump repeated stress that they were voluntary.
在宣布新的指导方针时 特朗普再次强调 这些指导方针是自愿的。
经济学人-科技
The surprise came when he discovered how his new material responded to repeated stress.
当他注意到新材料受到连续作用力而产生反应时,令他惊讶的现象出现了。
经济学人-科技
A new material that gets stiffer when it is stressed ONE of the valuable properties of bone is that when it endures repeated stress it responds by becoming denser and stronger.